What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 10.92°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

51.7

°F

December 13, 23:51

Trend:

stable

Yesterday:

51.6°F

Tomorrow:

51.5°F

Sunrise:

08:25

Sunset:

16:00

Day Length:

7 h. 35 min.

Holyhead in December

Minimum:

47.6°F

Average:

48.6°F

Maximum:

49.9°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 51.7°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.6°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature slightly varies from the average of the past two weeks. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 51.6°F on 2022, while the historical minimum was 50.0°F on 2019.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 51.2°F, the minimum temperature may reach 50.9°F, and the maximum might stay at 51.5°F.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
Nov 29	52.8°F	52.8°F	52.7°F
Nov 30	52.4°F	52.7°F	52.6°F
Dec 1	52.3°F	52.7°F	52.5°F
Dec 2	51.8°F	52.6°F	52.4°F
Dec 3	51.7°F	52.6°F	52.4°F
Dec 4	51.6°F	53.0°F	52.3°F
Dec 5	51.5°F	52.9°F	52.3°F
Dec 6	51.6°F	52.2°F	52.1°F
Dec 7	51.3°F	52.2°F	52.0°F
Dec 8	51.8°F	52.3°F	51.9°F
Dec 9	51.8°F	51.8°F	51.7°F
Dec 10	51.4°F	51.7°F	51.6°F
Dec 11	51.5°F	51.5°F	51.5°F
Dec 12	51.6°F	51.5°F	51.3°F
Dec 13	51.7°F	51.3°F	51.1°F
Dec 14	51.5°F	51.3°F	50.9°F
Dec 15	51.5°F	51.1°F	50.9°F
Dec 16	51.2°F	50.9°F	50.6°F
Dec 17	51.1°F	51.0°F	50.5°F
Dec 18	51.0°F	50.8°F	50.4°F
Dec 19	51.0°F	50.8°F	50.4°F
Dec 20	50.9°F	50.3°F	50.4°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.6°F in Winter, 48.5°F in Spring, 58.0°F in Summer, and 57.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	50.8°F	19mi
Bangor	48.6°F	21mi
Conwy	48.8°F	33mi
Douglas	52.4°F	59mi
Aberystwyth	49.6°F	66mi

* current water temperature in this city

** straight line distance from Holyhead